50
E
ES4710BD 10 Slots L2/L3/L4 Chassis Switch
VAC input socket for the positioning of power cords and easier wiring. In addition, on the left side
of the AC distribution panel is a power supply switch used to control the modules’ power output .
Please turn this power supply switch on during normal operation of the ES4710BD.
Telco network users usually require equipment to have -48V DC input, the DC power modules and
DC distribution box can satisfy this application. Two sets of -48V DC power input posts are
provided on the panel of ES4710BD DC distribution box. Each DC input will first pass through
protective circuits, such as the DC feed through filter, current limiting protection air switch,
coupling diode, and then provide power for all three DC power modules. The other modules and fan
trays are powered only after the DC output from the power modules are equalized and coupled.
Please turn on the air switch of -48V DC input during normal operation of ES4710BD.
1.4.5 System
Backplane
The system board of ES4710BD is located inside the switch, providing interconnectivity in the high
speed data links between management switching modules, network interface modules and between
all management and control signals of various cards. A backplane has been installed in the unit
chassis. The backplane provides the following functions:
z
Provides communication channel for cards to achieve interconnectivity of various signals
z
The backplane is powerless
z
Supports the hot-swapping of various cards
z
Supports Mainboard Master-Slave swap
z
Auto identification of all slots
z
Distributed power supplies
z
Introduction of monitoring signals for fans and power supplies
1.4.6 Fan Tray
Three fan assemblies
(EM-7608-FAN) can be configured in the ES4710BD, and installed in a
horizontal configuration into the fan module slots in the switch’s upper front panel. The three fan
assemblies cover the entire board area, ensuring sufficient ventilation for the devices, hence
enhancing the stability of devices even under high temperature environments. Each fan assembly
consists of 2 axial fans, which are protected by the fan tray to prevent bodily injury. Please note that
the fan blades still spin at a high speed when disconnected from the device during operation, to
avoid bodily injury
do not
touch the spinning blades.
1.4.7 Dust Gauze
The ES4710BD’s dust gauze lies under the board rack and prevents large particles in the air from
entering the switch. The dust gauze should be inserted from the front of the ES4710BD in a
horizontal position.
